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We consider a scenario of key sharing between a pair of legal users in the presence of passive eavesdropper. In this setting it is assumed the existence of a noisy channel between legal parties and also the existence of a noisy wire-tap channel (which is not necessary inferior to the main channel). In addition to noisy channel there is a noiseless public channel connecting legal parties. This means...
It has been proposed recently an approach to generate secret key exploiting reactance-domain scalar response of multipath fading channel. However, the security of the shared key has not been adequately investigated. In this paper we propose a mathematical model of the key distribution protocol based on the use of a Variable-Directional Antenna (VDA) acting on multipath wireless channels. The security...
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